swimAlex Koo
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 1600 Freestyle | SCY | 19:49.78 | 2026-06-24 | 2025 IN Open Water Championshipsvenue | |
| 50 Freestyle | LCM | 23.81 | AAAA·Winter JNs ✓+0.02s to Jr Nationals | 2026-01-01 | 2026 Speedo Junior National Championships |
| 100 Freestyle | LCM | 52.43 | AAAA·Winter JNs ✓+0.44s to Jr Nationals | 2026-08-06 | 2026 Speedo Junior National Time Trialsvenue |
| 200 Freestyle | LCM | 1:58.04 | AAA+1.45s to AAAA·Sectionals ✓+0.25s to Futures | 2024-07-12 | 2024 IN Swimming Swimfestvenue |
| 400 Freestyle | LCM | 4:21.10 | AA+0.51s to AAA·Sectionals ✓+11.11s to Futures | 2024-07-13 | 2024 IN Swimming Swimfestvenue |
| 50 Backstroke | LCM | 28.72 | AAA+0.73s to AAAA·+0.03s to Sectionals | 2023-08-04 | 2025 Central Zone 14 & Under Championship Meeslow pool |
| 100 Backstroke | LCM | 1:00.72 | AAA+1.63s to AAAA·Sectionals ✓+0.13s to Futures | 2024-03-23 | 2024 Spring Speedo Sectionalsvenue |
| 200 Backstroke | LCM | 2:15.27 | AA+0.48s to AAA·Sectionals ✓+3.38s to Futures | 2023-07-21 | 2023 IN Swimming AGS Entries |
| 50 Butterfly | LCM | 26.10 | AAAA·Futures ✓+0.71s to Jr Nationals | 2026-01-01 | 2026 Speedo Junior National Championships |
| 100 Butterfly | LCM | 56.60 | AAAA·Futures ✓+0.11s to Winter JNs | 2026-08-05 | 2026 Speedo Junior National Championshipsvenue |
| 200 Butterfly | LCM | 2:05.66 | AAAA·Winter JNs ✓+0.57s to Jr Nationals | 2026-08-03 | 2026 Speedo Junior National Championshipsvenue |
| 200 Individual Medley | LCM | 2:32.76 | BB+4.17s to A·+13.37s to Sectionals | 2021-08-06 | 2025 Central Zone 14 & Under Championship Meeslow pool |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 17.
National cuts (Sectionals → Nationals) are the current-season meet qualifying times for the swimmer's zone and age group; ✓ marks the hardest cut already achieved.
Pool tags are a venue speed heuristic (median deviation of all swims there vs each swimmer's typical time) — see the venue page for the method.
Fastest relay legs
| Leg | Course | Time | Start | Relay | Date | Meet |
|---|---|---|---|---|---|---|
| 50 Freestyle | LCM | 24.03 | flat | 200 Free Relay | 2025-03-27 | 2025 Central Zone East Spring Speedo Sectiona |
| 50 Freestyle | LCM | 23.17 | flying | 200 Medley Relay (leg 4) | 2024-05-31 | 2024 LSC Duel in the Pool |
| 50 Freestyle | LCM | 23.54 | flying | 200 Free Relay (leg 3) | 2024-06-01 | 2024 LSC Duel in the Pool |
| 100 Freestyle | LCM | 53.41 | flat | 400 Free Relay | 2025-03-28 | 2025 Central Zone East Spring Speedo Sectiona |
| 100 Freestyle | LCM | 53.50 | flying | 400 Free Relay (leg 4) | 2024-07-11 | 2024 IN Swimming Swimfest |
| 100 Freestyle | LCM | 53.24 | flying | 400 Medley Relay (leg 4) | 2024-03-24 | 2024 Spring Speedo Sectionals |
| 200 Freestyle | LCM | 1:59.34 | flat | 800 Free Relay | 2024-03-23 | 2024 Spring Speedo Sectionals |
| 200 Freestyle | LCM | 1:59.75 | flying | 800 Free Relay (leg 2) | 2024-07-13 | 2024 IN Swimming Swimfest |
| 100 Backstroke | LCM | 1:02.28 | flat | 400 Medley Relay | 2024-07-14 | 2024 IN Swimming Swimfest |
| 50 Butterfly | LCM | 25.72 | flying | 200 Medley Relay (leg 3) | 2025-03-28 | 2025 Central Zone East Spring Speedo Sectiona |
| 100 Butterfly | LCM | 57.26 | flying | 400 Medley Relay (leg 3) | 2025-03-30 | 2025 Central Zone East Spring Speedo Sectiona |
Reconstructed from relay split marks. Flat = lead-off (comparable to individual times); flying starts run ~0.5–0.7s fast and are not PRs.
IMX / IMR
IMX 17-18 · LCM
3243 points (4/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 400 FR LCM | 4:21.10 | 825 |
| 200 BK LCM | 2:15.27 | 825 |
| 200 FL LCM | 2:05.66 | 991 |
| 200 IM LCM | 2:32.76 | 602 |
| 200 BR LCM | — | 0 |
| 400 IM LCM | — | 0 |
IMR 17-18 · LCM
3367 points (4/5 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 200 FR LCM | 1:58.04 | 917 |
| 100 BK LCM | 1:00.72 | 880 |
| 100 FL LCM | 56.60 | 968 |
| 200 IM LCM | 2:32.76 | 602 |
| 100 BR LCM | — | 0 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle LCM 52.43 RT 0.65s
Front half 25.62s · back half 26.81s
200 Freestyle LCM 1:58.04
Front half 56.82s · back half 61.22s
400 Freestyle LCM 4:21.10
Front half 126.75s · back half 134.35s
100 Backstroke LCM 1:00.72
Front half 29.62s · back half 31.10s
100 Butterfly LCM 56.60 RT 0.63s
Front half 26.23s · back half 30.37s
200 Butterfly LCM 2:05.66 RT 0.65s
Front half 58.60s · back half 67.06s
200 Individual Medley LCM 2:32.76
Front half 72.32s · back half 80.44s
Reaction time
From electronically-timed starts only (~2% of corpus swims carry a reaction time). PRs with a recorded reaction show an RT chip in the splits section above.
Swim history
Every recorded swim, newest first
| Date | Event | Course | Time | Age | Round | Meet |
|---|
Individual swims with a recorded date and time — including disqualifications — plus reconstructed relay legs (marked). Assembled in the browser from this page’s data.
Progression
Faster times are higher. One card per event, all courses & history.